OEM Carrier High Pressure Switch HK02ZA395 / HK02ZB044 for Model PH1ZNA060000AAAA

This genuine OEM Carrier high pressure switch (part numbers HK02ZA395 and HK02ZB044) is the factory-specified refrigerant safety switch for the Carrier PH1ZNA060000AAAA packaged heat pump unit. Mounted in the high-side refrigerant circuit, this pressure switch continuously monitors system pressure and opens the circuit when pressure exceeds the safe threshold — protecting the compressor from catastrophic damage. When this switch fails or trips repeatedly, you'll experience nuisance lockouts, no-cooling conditions, or a system that immediately shuts down after startup without an obvious refrigerant-side cause.

• Specs: Opens at 395 PSI | Closes at 295 PSI | Sensata PS80 series | 6(6)A @ 240 VAC | PMAX 41B | 1/8" NPT male thread connection | SPST normally closed
• OEM vs Generic: This OEM switch is manufactured to Carrier's exact pressure setpoints (±3% tolerance). Aftermarket alternatives often carry wider tolerances, risking either premature nuisance trips or — more dangerously — failure to open at true overpressure conditions, exposing your compressor to damage.
• Install difficulty: 2/5 — Refrigerant circuit work must be performed by an EPA 608-certified technician. Recover refrigerant before removing the switch. Tools needed: refrigerant recovery machine, manifold gauge set, adjustable wrench, 1/8" NPT thread sealant. Always leak-check after reinstallation.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse when ordered before 3 PM EST.

Compatibility: Directly fits Carrier model PH1ZNA060000AAAA packaged heat pump units. Also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify refrigerant circuit type and existing switch PSI ratings on your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy.